Patents by Inventor Gunter Mau

Gunter Mau has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Acetylketene dialkyl acetals and a process for their preparation
    Patent number: 4825008
    Abstract: The invention relates to a process for the preparation of acetylketene dialkyl acetals of the formula CH.sub.3 CO--CH.dbd.C(OR.sup.2).sub.2 in which R.sup.2 can be an alkyl radical with 1 to 12 carbon atoms, and also these compounds themselves, providing that R.sup.2 is an alkyl radical with 3 to 12 carbon atoms. In the preparation process an alkyl acetoacetate of the formula CH.sub.3 CO--CH.sub.2 COOR.sup.1 is reacted with a saturated primary or secondary alcohol R.sup.2 OH in the presence of an acid catalyst, in which R.sup.2 has the abovementioned meaning and in which R.sup.2 OH or is higher boiling than R.sup.1 OH.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: April 25, 1989
    Assignee: Hoeschst Aktiengesellschaft
    Inventors: Klaus Gunther, Gunter Mau
  • Process for compressing ketene
    Patent number: 4001332
    Abstract: Ketene is compressed by means of a liquid ring pump using ketene-containing diketene as operating liquid.
    Type: Grant
    Filed: December 9, 1975
    Date of Patent: January 4, 1977
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gunter Mau, Gunter Jacobsen, Erich Brandes